These examples show typical ways to configure your SAN Volume Controller.
Figure 1 illustrates
a small SAN configuration. Two fibre-channel
switches are use to provide redundancy. Each host system, SAN Volume Controller node,
and storage system is
connected to both fibre-channel switches.
Figure 2 illustrates
a medium-sized fabric that consists of three fibre-channel switches.
These switches are interconnected with interswitch links (ISLs). For
redundancy, use two fabrics with each host system, SAN Volume Controller node,
and storage system that
are being connected to both fabrics. The
example fabric attaches the SAN Volume Controller nodes
and the storage systems to
the core switch. There are no ISL hops between SAN Volume Controller nodes
or between nodes and the storage systems.
Figure 3 illustrates
a large fabric that consists of two core fibre-channel switches and
edge switches that are interconnected with ISLs. For redundancy, use
two fabrics with each host system, SAN Volume Controller node,
and storage system that
is being connected. Both fabrics attach the SAN Volume Controller nodes
to both core fabrics and distribute the storage systems between
the two core switches. This ensures that
no ISL hops exist between SAN Volume Controller nodes
or between nodes and the storage systems.
Figure 4 illustrates
a fabric where the host systems are located at two different sites.
A long-wave optical link is used to interconnect switches at the different
sites. For redundancy, use two fabrics and at least two separate long-distance
links. If a large number of host systems are at the remote site, use
ISL trunking to increase the available bandwidth between the two sites.
